<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息"
                type="info"
                center
                close-text
                :closable="false"
                effect="dark">
      </el-alert>
      <el-steps :active="active-0"
                finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form :model="addForm"
               :rules="addFormrules"
               ref="addFormRef"
               label-width="100px"
               class="demo-ruleForm"
               label-position="top">
        <el-tabs tab-position="left"
                 :before-leave="beforeLeave"
                 @tab-click="tabClick"
                 v-model="active">
          <el-tab-pane label="基本信息"
                       name="0">
            <el-form-item label="商品名称"
                          prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格"
                          prop="goods_price">
              <el-input v-model="addForm.goods_price"
                        type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量"
                          prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量"
                          prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类"
                          prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat"
                           style="height:100px"
                           :options="categoryList"
                           :props="cateProps"
                           expandTrigger="hover"
                           @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数"
                       name="1">
            <el-form-item :label="item.attr_name"
                          v-for="item in manyTableData"
                          :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="at"
                             v-for="(at,i) in item.attr_vals"
                             :key="i"
                             border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性"
                       name="2">
            <el-form-item :label="item.attr_name"
                          v-for="item in onlyTableData"
                          :key="item.attr_id">
              <el-input v-model="item.attr_vals">

              </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片"
                       name="3">
            <el-upload class="upload-demo"
                       :action="uploadUrl"
                       :on-preview="handlePreview"
                       :on-remove="handleRemove"
                       :headers="headerObj"
                       :on-success="uploadSuccess"
                       list-type="picture">
              <el-button size="small"
                         type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容"
                       name="4">
            <el-form-item >
              <quill-editor ref="myQuillEditor"
                            v-model="addForm.goods_introduce" />
            </el-form-item>
            <el-button type="primary"
                       @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览"
               :visible.sync="previewVisible"
               width="75%">
      <img :src="previewPath"
           alt=""
           class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      active: '0',
      addForm: {
        goods_cat: []
      },
      // 商品分类下的动态参数
      manyTableData: [],
      // 静态属性变量
      onlyTableData: [],
      categoryList: [],
      // 上传的url的路径
      uploadUrl: 'http://localhost:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      addFormrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: true
      },
      selectCat: [],
      previewVisible: false,
      previewPath: ''
    }
  },
  created () {
    this.getCategories()
  },
  methods: {
    // 计算选中分类后的分类id
    calculateCategory () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
    async getCategories () {
      const res = await this.$http.get('categories', {
        params: { pagenum: 1, pagesize: 20 }
      })
      console.log(res)

      if (res.data.meta.status !== 200) {
        this.$message.error('获取商品分类失败')
        return
      }
      this.categoryList = res.data.data.result
    },
    handleChange () {
      console.log(this.addForm.goods_cat.length)

      if (this.addForm.goods_cat.length !== 3) {
        console.log(123)

        this.addForm.goods_cat = []
        return this.$message.warning('只可以选择第三极分类哦')
      }
    },
    beforeLeave (activeName, oldActiveName) {
      //   console.log('即将离开的标签页名字是' + oldActiveName)
      //   console.log('即将进入的标签页名字是' + activeName)

      // 如果商品没有选择分类，则不允许跳转到其他标签页
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类哦')
        return false
      }
      return true
    },
    // 每次点击tab栏的时候会触发
    async tabClick () {
      if (this.active === '1') {
        // 说明点击了动态参数一栏
        // 发送请求得到分类的参数
        const { data: res } = await this.$http.get(
          `categories/${this.calculateCategory()}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数失败')
        }

        if (res.data.length !== 0) {
          res.data.forEach(item => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
          })
        }
        this.manyTableData = res.data
        console.log('长度为', this.manyTableData)
      } else if (this.active === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.calculateCategory()}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }

        this.onlyTableData = res.data
      }
    },
    // 商品图片的预览事件
    handlePreview (file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 商品图片列表的移除事件
    handleRemove (file) {
      console.log(file)
      // 1：获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2：从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3：调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    uploadSuccess (response) {
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象push到addform的pics数组中
      this.addForm.pics.push(picInfo)
    },
    async add () {
      this.$refs.addFormRef.validate(vali => {
        if (!vali) {
          return this.$message.error('请填写必要的表单项')
        }
      })
      // 执行添加逻辑
      // 深拷贝表单。是由于改变了级联选择器绑定的数据类型，所以导致报错，这时候深拷贝一份
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')
      // 处理动态参数和静态属性
      this.manyTableData.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      // 静态属性
      this.onlyTableData.forEach(item => {
        const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
        this.addForm.attrs.push(newInfo)
      })
      form.attrs = this.addForm.attrs
      console.log(form)

      // 发起请求
      const { data: res } = await this.$http.post('goods', form)

      // 路由导航值商品列表页
      this.$router.push('/goods')
    }
  }
}
</script>

<style>
.el-step {
  margin-top: 10px;
}
.el-radio {
  position: absolute !important;
  width: 100% !important;
  float: left !important;
  border: 0px !important;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.ql-container {
  min-height: 300px;
}
</style>
